One kind of female butterfly mates only once in its life -- and then closes its wings to avoid "harassment" when pursued by persistent and unwanted males, a Japanese researcher said.
日本一位研究人员称,雌性红灰蝶一生只交配一次,在其它雄性红灰蝶不停地追求它时,它会合上翅膀躲避这种不必要的“骚扰”。
Observations of the Small Copper Butterfly, a colourful orange and black butterfly, showed that some females closed their wings when males flew by, but only when they were males of their own species, said Jun-Ya Ide, an associate professor at Kurume Institute of Technology in Fukuoka, western Japan.
红灰蝶全身黄黑相间。日本西部福冈市久留米大学副教授六月亚井发现,当雄性红灰蝶飞近时,一些雌性红灰蝶经常会合拢翅膀。
"When we looked into why, the males were courting the females. They do this very stubbornly, so the females sometimes try to get away -- or prefer to stay unobserved," he added.
他补充说:“我们试图揭开谜团时发现,这些雄蝶在追求雌蝶,它们非常执着,因此雌蝶有时想要逃开,或者宁可躲起来。”
Ide and his colleagues brought a model of a male butterfly near the females to test their reactions and found that young females that had yet to mate kept their wings open, but those that had already mated closed them.
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